Device and method for measuring sliding plug door

Abstract

The invention discloses a sliding plug door measuring device and method, relates to the technical field of measurement, and aims to solve the technical problems that in the prior art, the operation of measuring and plugging out from the outside is difficult, even measurement cannot be carried out sometimes, and the train overhaul effect and overhaul efficiency are affected. A measuring device is arranged on the main rod, the measuring device comprises a measuring part and a driving part used for driving the measuring part to expand and contract, the width of the expanded measuring part is matched with the width of the gap, and a display part matched with the measuring part is arranged on the main rod. According to the invention, the main rod and the like are adopted, so that a worker can directly measure the width of a gap in a carriage, on one hand, the detection difficulty is reduced, and the worker can carry out detection in any environment (such as overhaul, maintenance or accidental failure and the like); and on the other hand, the measuring part is directly contacted with the vehicle door and the vehicle body on two sides of the gap to obtain data which are directly displayed on the display part, and the detection result is accurate.

Description

Technical Field

[0001] This invention belongs to the field of measurement technology, specifically relating to a measuring device and method for a sliding door. Background Technology

[0002] A sliding door is an automatic door system for rail transit vehicles that combines the actions of sliding in and pulling out. Its characteristics are that the door body slides out during the opening and closing process, and when closed, it is flush with the outer skin of the car body. When open, it overlaps with the car body, which has advantages such as reducing air resistance, reducing noise, and saving air conditioning energy consumption.

[0003] Due to the complex structure and challenging installation, maintenance, and cleaning operations of sliding doors, their failure rate accounts for a relatively high proportion of the overall train failure rate. Therefore, it is necessary to frequently monitor relevant parameters of the sliding doors to determine if any malfunctions have occurred. In particular, the distance between the outer surface of the sliding door and the outer surface of the frame when the door is fully open, known as the "plug-out" or door parallelism, is a key technical parameter for measuring the door's installation accuracy, sealing performance, and operational safety. Whether its value is within the design standard range directly affects the vehicle's aerodynamic performance, sound insulation, waterproofing, and operational stability. If the plug-out value is too large, it will generate additional aerodynamic drag during high-speed train operation, increasing energy consumption and easily causing door vibration. If the plug-out value is too small, it will lead to poor sealing between the door and the car body, resulting in air leaks, water leaks, and sound leaks. In severe cases, it can also affect the reliability of the door's locking mechanism, creating safety hazards. Therefore, accurate measurement of the plug-out value is an indispensable and crucial step in the production, assembly, daily maintenance, and troubleshooting of sliding doors.

[0004] Currently, the methods and tools used in the industry for measuring the plug-out value of sliding doors are relatively traditional, generally suffering from problems such as cumbersome operation, limited measurement conditions, insufficient accuracy, and low efficiency. Existing measurement methods mainly rely on general measuring tools such as steel tape measures, rulers, and ordinary feeler gauges, and the measurement work must be completed outside the carriage. Specifically, maintenance personnel need to use auxiliary equipment such as A-frame ladders and maintenance platforms to stand on the outside of the vehicle and measure the plug-out value of the upper and lower parts of the door one by one, which has many limitations. For example, in maintenance stations, vehicles are usually suspended above the ground by rails and supports. During maintenance, a platform needs to be built, which not only prolongs the data measurement time, but also, in some special environments, makes it impossible to build a platform for external measurement, affecting the efficiency and effectiveness of train maintenance. Summary of the Invention

[0005] This invention discloses a plug door measuring device and method, which aims to solve the technical problems in the prior art where it is difficult to measure the plug door from the outside, or even impossible to measure it at times, which affects the train maintenance effect and efficiency.

[0006] To solve the aforementioned technical problems, the present invention adopts the following technical solution:

[0007] A sliding door measuring device includes a main rod that can be inserted into the gap between a car door and a car body. A measuring device is provided on the main rod. The measuring device includes a measuring part and a driving part for driving the measuring part to expand and contract. The width of the measuring part after expansion matches the width of the gap. A display part that cooperates with the measuring part is provided on the main rod.

[0008] After adopting this technical solution, a main rod that can be inserted into the gap between the car door and the car body is set up. Then, by activating the drive unit, the measuring part set on the main rod can make contact with the car door and the car body respectively. The straight-line distance between the contact points of the measuring part and the car door and the car body is the width of the gap. This result will be displayed through the display unit, thus completing the measurement of the gap data.

[0009] This application uses a main rod, etc., which allows staff to measure the width of the gap directly inside the carriage. On the one hand, it reduces the difficulty of inspection and allows staff to conduct inspections in any environment (inspection, maintenance, or unexpected malfunctions, etc.). On the other hand, it allows the measuring part to directly contact the doors and body on both sides of the gap to obtain data that is directly displayed on the display unit, resulting in more accurate inspection results.

[0010] Preferably, the driving part includes a scale rod slidably connected to the main rod, and the measuring part includes an array of four hinged rods. Each set of four hinged rods includes two sets of symmetrically arranged folding parts. The two ends of each set of folding parts are rotatably connected to the scale rod and the main rod, respectively. An elastic device is provided at the rotatable connection between the folding part and the scale rod and the main rod.

[0011] By adopting this technical solution, this application first sets up an elastic device so that the operator has a certain resistance when sliding the scale rod, which increases the operator's feel when sliding and measuring. After the measurement is completed, it can automatically rebound, which is convenient for the next use and improves the convenience of the device in use. The measuring part includes two sets of symmetrically arranged folding parts, which allows the measuring part to be stored when not in use, making it easy to carry and further improving the convenience of the device in use.

[0012] Preferably, the main rod is provided with a bracket that cooperates with the folding part. The bracket is provided with a first through hole that cooperates with the folding part. The first through hole adopts a cross structure and penetrates all four sides of the bracket. The first through hole is set along the height of the bracket. The scale rod is slidably connected to the first through hole through a slider. The slider also adopts a cross structure. A fixing rod that cooperates with the folding part is also provided in the first through hole.

[0013] By adopting this technical solution, the four hinge rods can be housed within the bracket through the bracket and the first through hole, reducing the space occupied by the device. Simultaneously, the cross-shaped first through hole and the slider, in conjunction with the elastic device, enhance the stability of the scale rod during sliding, thereby improving the stability of the device during use.

[0014] Preferably, the folding portion includes a first rod disposed away from the display portion and a second rod disposed close to the display portion. One end of the first rod and one end of the second rod are rotatably connected to the slider and the fixed rod, respectively. The second rod is rotatably connected to the first rod, and the rotatable connection point between the second rod and the first rod is located between the center and the edge of the first rod. The length of the second rod is 1 / 3 to 1 / 2 of the length of the first rod.

[0015] By adopting this technical solution, the length of the second rod relative to the first rod is set simultaneously, as well as the rotation points of the first and second rods relative to the scale rod and the main rod are restricted. This ensures the stability of the four-bar hinge when unfolded, and allows the two first rods of the same set of four-bar hinges to simultaneously contact the surfaces of the carriage and the car body, thereby improving the accuracy of the measurement.

[0016] Preferably, the measuring device further includes a laser generator disposed on one of the first rods of each set of four hinged rods. The laser generator is disposed at the end of the first rod near the display unit. A laser receiver cooperating with the laser generator is disposed on the other first rod. The scale rod is provided with several second through holes cooperating with the laser generator and the laser receiver. The several second through holes are disposed along the height of the scale rod.

[0017] After adopting this technical solution, a second through hole, a laser generator, and a laser receiver are set up. The laser generated by the laser generator passes through the second through hole and is received by the laser receiver. The width of the gap between the car door and the car body can be calculated at the time of reception, and the result can be obtained quickly.

[0018] Preferably, the display unit includes a scale bar disposed on the main rod, the scale bar being disposed on the side of the main rod away from the measuring device, and the correspondence between the scale bar, the scale rod, and the first rod being set based on the Pythagorean theorem.

[0019] After adopting this technical solution, when the staff slides the scale rod, it can correspond to the relevant scale on the scale bar, and the relevant results can be obtained directly by reading the value. The measurement method is simple and the results are reliable. There is no need to set up an additional control mechanism, which can reduce costs.

[0020] Preferably, the display unit includes a display screen disposed on the main rod, the display screen being disposed on the side of the main rod away from the measuring device, and a controller being disposed within the display screen, the controller being wirelessly connected to the laser receiver.

[0021] After adopting this technical solution, a controller and display screen are set up. After the laser generator and laser receiver are working, the relevant data can be obtained directly through the display screen without reading the data. This makes operation more convenient and further improves the ease of use of the device.

[0022] Preferably, the scale rod is provided with a rack, the main rod is provided with a gear that meshes with the rack, and the main rod is provided with a locking pin that meshes with the gear.

[0023] By adopting this technical solution, a rack is installed on the scale rod, and a gear that meshes with the rack is installed on the main rod. On the one hand, the meshing between the gear and the rack slows down the opening speed and angle of the four hinge rods, allowing them to contact the door and vehicle body at a slower speed, thus improving the accuracy of the test data. On the other hand, it also protects the passenger compartment and vehicle body. Simultaneously, the locking pin secures the gear and locks the scale rod after the folding part contacts the door and vehicle body, thereby fixing the test results and ensuring their accuracy.

[0024] Preferably, the main rod is provided with an auxiliary positioning device, which is located on the side of the main rod away from the display part and connected to the measuring part. The auxiliary positioning device includes an auxiliary rod that is rotatably connected to the main rod. The auxiliary rod adopts a telescopic structure. The auxiliary rod is connected to the folding part through a connecting rod. The two ends of the connecting rod are slidably connected to the auxiliary rod through connecting blocks. The connecting rod is rotatably connected to the folding part.

[0025] By adopting this technical solution, an auxiliary positioning device is installed on the main rod. The auxiliary rod and connecting rod of the auxiliary positioning device are rotatably connected to the first rod of the folding part, while the connecting rod is slidably connected to the auxiliary rod. Simultaneously with the sliding scale rod, the auxiliary rod rotates synchronously, first contacting the doors and vehicle body on both sides of the gap, thus confining the main rod to the middle position of the gap. Then, the scale rod continues to slide, bringing the first rod into contact with both ends of the gap to measure its width. This setup further improves the accuracy of the device in measuring gap width, thereby enhancing its overall accuracy during use.

[0026] A measurement method using a sliding door measuring device, comprising the following steps:

[0027] S1: The staff stands inside the carriage and inserts the main pole into the gap between the door and the carriage body;

[0028] S2: The measuring unit is unfolded by the drive unit, and the two ends of the measuring unit contact the door and the vehicle body respectively;

[0029] S3: Output the measurement results through the display unit.

[0030] This technical solution allows for the measurement of gaps between doors and the vehicle body from inside the carriage, simplifying the measurement process while maintaining accuracy. Furthermore, the device is adaptable to various environments, enhancing its practicality.

[0031] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0032] (1) This application uses a main rod, etc., so that the staff can measure the width of the gap directly inside the carriage. On the one hand, it reduces the difficulty of the inspection and allows the staff to carry out the inspection in any environment (inspection, maintenance or accidental failure, etc.). On the other hand, it directly allows the measuring part to contact the door and body on both sides of the gap to obtain data that is directly displayed on the display part, and the inspection results are more accurate.

[0033] (2) This application first sets up an elastic device so that when the staff slides the scale rod, there is a certain resistance, which increases the staff's feel when sliding the measurement. After the measurement is completed, it can automatically rebound, which is convenient for the next use and improves the convenience of the device in use. The measuring part includes two sets of symmetrically arranged folding parts, which allows the measuring part to be stored when it is not needed for measurement, making it easy to carry and further improving the convenience of the device in use.

[0034] (3) The four hinge rods can be stored in the bracket through the bracket and the first through hole, reducing the space occupied by the device. At the same time, the first through hole of the cross structure and the setting of the slider can cooperate with the elastic device to improve the stability of the scale rod when sliding, thereby improving the stability of the device during use.

[0035] (4) Set up a second through hole, a laser generator and a laser receiver. After the laser generated by the laser generator passes through the second through hole and is received by the laser receiver, the width of the gap between the car door and the car body can be calculated at the time of reception, and the result can be obtained quickly.

[0036] (5) When the staff slides the scale rod, it can correspond to the relevant scale on the scale bar, and the relevant results can be obtained directly by reading the value. The measurement method is simple and the results are reliable. There is no need to set up an additional control mechanism, which can reduce costs.

[0037] (6) A rack is installed on the scale rod, and a gear that meshes with the rack is installed on the main rod. On the one hand, the meshing between the gear and the rack can slow down the opening speed and angle of the four hinge rods, so that the four hinge rods contact the door and the car body at a slow speed, thereby improving the accuracy of the test data. On the other hand, it can protect the car body and the car compartment. At the same time, the setting of the locking pin can fix the gear and lock the scale rod after the folding part contacts the door and the car body, thereby fixing the test results and ensuring the accuracy of the results. Attached Figure Description

[0038] The present invention will be described by way of example and with reference to the accompanying drawings, wherein:

[0039] Figure 1 This is a three-dimensional structural schematic diagram of a sliding door measuring device and measuring method according to the present invention;

[0040] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0041] Figure 3 for Figure 1 Enlarged structural diagram at point B;

[0042] Figure 4 A schematic diagram showing the positional structure of gears, racks, and pins;

[0043] Figure 5 A schematic diagram showing the location and structure of the laser transmitter and laser receiver;

[0044] Figure 6 This is a schematic diagram showing the position and structure of the auxiliary rod and connecting rod.

[0045] Figure Labels

[0046] 1-Scale bar, 2-Main rod, 201-Pin, 202-Bracket, 203-Fixing rod, 204-Gear, 3-Scale rod, 301-Rack, 302-Slider, 303-Second through hole, 4-Hinge four-bar, 401-Second rod, 402-First rod, 403-Pulley, 5-First telescopic spring, 6-Laser generator, 7-Laser receiver, 8-Auxiliary positioning device, 801-Auxiliary rod, 802-Connecting rod. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments and accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0048] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0049] The following is combined Figures 1-6 The present invention will be described in detail below.

[0050] Example 1

[0051] A type of sliding door measuring device, such as Figures 1-4 As shown, the device includes a main rod 2 that can be inserted into the gap between the car door and the car body. A measuring device is provided on the main rod 2. The measuring device includes a measuring part and a driving part for driving the measuring part to expand and contract. The width of the measuring part after expansion matches the width of the gap. A display part that cooperates with the measuring part is provided on the main rod 2.

[0052] In this embodiment, the main rod 2 is made of stainless steel. Stainless steel is corrosion-resistant, rust-resistant, has a neat and beautiful appearance, a long service life, is lightweight, and is easy to carry.

[0053] In this embodiment, the length and diameter of the main rod 2 are 1000mm and 15mm, respectively.

[0054] In this embodiment, the driving unit includes a scale rod 3 that is slidably connected to the main rod 2, and the measuring unit includes an array of four hinged rods 4. Each set of four hinged rods 4 includes two sets of symmetrically arranged folding parts. The two ends of each set of folding parts are respectively rotatably connected to the scale rod 3 and the main rod 2. An elastic device is provided between the folding parts and the rotatably connected points of the scale rod 3 and the main rod 2.

[0055] In this embodiment, the main rod 2 is provided with a sliding groove that cooperates with the scale rod 3, and the sliding groove is integrally formed with the main rod 2.

[0056] In this embodiment, the scale rod 3 is also made of stainless steel.

[0057] In this embodiment, the scale rod 3 adopts a hollow structure. This design can reduce the overall weight of the device and make it easy to carry.

[0058] In this embodiment, a set of four hinged rods 4 is provided. In other embodiments, two or three sets of four hinged rods 4 can also be provided. When the measuring part is unfolded, it forms an umbrella-like structure. When the umbrella-like structure is inserted into the gap, no matter how the main rod 2 rotates, it can contact the car door and the car body on both sides of the gap, ensuring the accuracy of the measurement.

[0059] In this embodiment, the elastic device is a first telescopic spring 5.

[0060] In this embodiment, the first telescopic spring 5 is sleeved on the scale rod 3 and is located between the slider 302 and the fixed rod 203.

[0061] In this embodiment, as Figure 1 As shown, the main rod 2 is provided with a bracket 202 that cooperates with the folding part. The bracket 202 is provided with a first through hole that cooperates with the folding part. The first through hole adopts a cross structure and penetrates all four sides of the bracket 203. The first through hole is set along the height of the bracket 202. The scale rod 3 is slidably connected to the first through hole through a slider 302. The slider 302 also adopts a cross structure. The bracket 202 is also provided with a fixing rod 203 that cooperates with the folding part.

[0062] In this embodiment, the bracket includes four sides. A first through hole penetrates two opposite sides, while the other two opposite sides are provided with sliding grooves. The slider 302 is inserted into the sliding grooves and engages with the first through hole, allowing the slider 302 to slide stably within the first through hole. Figure 2 As shown.

[0063] In this embodiment, the fixing rod 203 has a first through hole that penetrates both sides of the bracket, such as... Figure 2 As shown.

[0064] In this embodiment, two fixing rods 203 are provided.

[0065] In this embodiment, the bracket 202 is installed on the top of the main rod 2 by welding.

[0066] In this embodiment, the length, width and height of the bracket 202 are 70*17*17mm.

[0067] In this embodiment, the folding part includes a first rod 402 disposed away from the display part and a second rod 401 disposed close to the display part. One end of the first rod 402 and one end of the second rod 401 are rotatably connected to the slider 302 and the fixing rod 203, respectively. The rotatable connection between the second rod 401 and the first rod 402 is located between the center and the edge of the first rod 402. The second rod 401 is rotatably connected to the first rod 402, and the length of the second rod 401 is 1 / 3 to 1 / 2 of the length of the first rod 402.

[0068] In this embodiment, a pulley 403 is provided at the end of the first rod 402. The pulley 403 can protect the car door and the side wall of the car body, and prevent the first rod 402 from damaging the car body and the car door when it is unfolded.

[0069] In this embodiment, the first rod 402 is rotatably connected to the slider 302. The first rod 402 is rotatably connected to the slider 302 through a hinge. The slider 302 is provided with hinge seats at both ends, and a hinge rod is rotatably connected in the middle of the hinge seats. The first rod 402 is provided with a hinge ring that cooperates with the hinge rod.

[0070] In this embodiment, the connection method between the second rod 401 and the fixed rod 203, the first rod 402 and the second rod 401 is the same as the connection method between the first rod 402 and the slider 302, which will not be described in detail here.

[0071] In this embodiment, the length of the second rod 401 is half the length of the first rod 402.

[0072] In this embodiment, the connection point between the second rod 401 and the first rod 402 is the center position of the first rod 402.

[0073] In this embodiment, the display unit includes a scale bar 1 disposed on the main rod 2. The scale bar 1 is disposed on the side of the main rod 2 away from the measuring device. The correspondence between the scale bar 1 and the scale rod 3 and the first rod 402 is set based on the Pythagorean theorem.

[0074] In this embodiment, the scale bar 1 is connected to the main rod 2 by welding.

[0075] In this embodiment, the length of the first rod 402 is fixed as a, the sliding distance of the scale rod 3 is set as b, and the vertical distance from the end of the first rod 402 to the scale rod 3 is c. According to the Pythagorean theorem... The gap is twice the length of c. Based on this, we can set the corresponding scale on scale bar 1 and directly convert it into the length of c, thus obtaining the width of the gap.

[0076] In this embodiment, a rack 301 is provided on the scale rod 3, a gear 204 that cooperates with the rack 301 is provided inside the main rod 2, and a locking pin 201 that cooperates with the gear 204 is also provided on the main rod 2.

[0077] In this embodiment, the main rod 2 is provided with a receiving groove for accommodating the gear 204, and the receiving groove is connected to the sliding groove.

[0078] In this embodiment, the rack 301 is connected to the scale rod 3 by welding.

[0079] In this embodiment, the gear 204 is connected to the main rod 2 via a rotating shaft, and the gear 204 is disposed inside the main rod 2.

[0080] In this embodiment, after the locking pin 201 is inserted into the main rod 2, it can abut against the teeth of the gear 204, such as... Figure 4 As shown, the position of the scale rod 3 is fixed.

[0081] In this embodiment, the main rod 2 is provided with a mounting groove for mounting a locking pin 201, the mounting groove communicating with the receiving groove, and a return spring sleeved on the outer wall of the locking pin 201, the return spring being located inside the main rod 2, such as... Figure 4 As shown.

[0082] A measurement method using a sliding gate measuring device, such as Figures 1-4 As shown, it includes the following steps:

[0083] S1: The staff stands inside the carriage and inserts the main rod 2 into the gap between the door and the body. The detection positions are 10cm down from the top of the door frame and 10cm up from the bottom of the door frame.

[0084] S2: When the main rod 2 is inserted into the gap, the staff pulls the scale rod 3, causing the scale rod 3 to move towards the staff, which drives the first rod 402 to rotate towards the staff around the slider 302, gradually contacting both sides of the gap, that is, the car body and the door.

[0085] S3: After the two ends of the first rod 402 come into contact with the vehicle body and the door, insert the locking pin 201 to fix the scale rod 3 relative to the main rod 2, and then read the data on the scale bar 1 to obtain the result.

[0086] This application adopts a main rod type 2, which allows staff to measure the width of the gap directly inside the carriage. This reduces the difficulty of inspection and allows staff to perform inspections in any environment (inspection, maintenance, or unexpected malfunctions, etc.). Furthermore, the data obtained by direct contact between the measuring unit and the doors and body on both sides of the gap is directly displayed on the display unit, resulting in more accurate inspection results.

[0087] Example 2

[0088] This embodiment is basically the same as Embodiment 1, except that: Figure 5 As shown, in this embodiment, the measuring device further includes a laser generator 6 disposed on one of the first rods 402 of each set of four hinged rods 4. The laser generator 6 is disposed at the end of the first rod 402 near the display part. A laser receiver 7 cooperating with the laser generator 6 is disposed on the other first rod 402. A plurality of second through holes 303 cooperating with the laser generator 6 and the laser receiver 7 are disposed on the scale rod 3. The plurality of second through holes 303 are disposed along the height of the scale rod 3.

[0089] In this embodiment, the laser generator 6 and the laser receiver 7 are disposed on the side of the first rod 402 near the main rod 2.

[0090] In this embodiment, both the laser generator 6 and the laser receiver 7 are embedded in the first rod 402.

[0091] In this embodiment, the display unit includes a display screen disposed on the main rod 2. The display screen is disposed on the side of the main rod 2 away from the measuring device. A controller is disposed inside the display screen, and the controller is wirelessly connected to the laser receiver 7.

[0092] In this embodiment, the controller and the display screen are connected by a wire. The display screen is equipped with a rechargeable battery, which powers the controller and the display screen. The controller is equipped with a wireless receiving module, and the laser receiver 7 and the laser generator 6 are equipped with wireless transmitting modules.

[0093] Example 3

[0094] This embodiment is basically the same as embodiment 2, except that: Figure 6As shown, in this embodiment, an auxiliary positioning device 8 is provided on the main rod 2. The auxiliary positioning device 8 is located on the side of the main rod 2 away from the display part and is connected to the measuring part. The auxiliary positioning device 8 includes an auxiliary rod 801 that is rotatably connected to the main rod 2. The auxiliary rod 801 adopts a telescopic structure. The auxiliary rod 801 is connected to the folding part through a connecting rod 802. The two ends of the connecting rod 802 are slidably connected to the auxiliary rod 801 through connecting blocks. The connecting rod 802 is rotatably connected to the folding part.

[0095] In this embodiment, the auxiliary rod 801 is rotatably connected to the main rod 2, and the rotatable connection method is the same as that of the first rod 402 and the slider 302, which will not be described in detail here.

[0096] In this embodiment, the auxiliary rod 801 includes a mother rod and a daughter rod sleeved in the mother rod. The mother rod and the daughter rod form a closed structure. A second telescopic spring is provided inside the mother rod and the daughter rod. The two ends of the second telescopic spring are respectively connected to the side of the mother rod and the daughter rod away from each other by welding.

[0097] In this embodiment, the main rod is connected to the bracket 202, and the sub-rod is in contact with the car door and the car body. A rubber pad is provided on the side of the sub-rod away from the wooden rod, which can also protect the car door and the car body.

[0098] In this embodiment, the auxiliary rod 801 is provided with a sliding groove on the side away from the main rod 2. The sliding groove is slidably connected to the connecting block, and both ends of the connecting rod 802 are rotatably connected to the connecting block. The connection method is the same as that of the first rod 402 and the slider 302, which will not be described in detail here.

[0099] In this embodiment, the other end of the connecting rod 802 is rotatably connected to the first rod 402 via a connecting block.

[0100] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sliding door measuring device, characterized in that: The device includes a main rod (2) that can be inserted into the gap between the car door and the car body. A measuring device is provided on the main rod (2). The measuring device includes a measuring part and a driving part for driving the measuring part to expand and contract. The width of the measuring part after expansion matches the width of the gap. A display part that cooperates with the measuring part is provided on the main rod (2).

2. The sliding door measuring device according to claim 1, characterized in that: The driving part includes a scale rod (3) that is slidably connected to the main rod (2), and the measuring part includes an array of four hinge rods (4). Each set of four hinge rods (4) includes two sets of symmetrically arranged folding parts. The two ends of each set of folding parts are rotatably connected to the scale rod (3) and the main rod (2) respectively. An elastic device is provided at the rotatable connection between the folding parts and the scale rod (3) and the main rod (2).

3. The sliding door measuring device according to claim 2, characterized in that: The main rod (2) is provided with a bracket (202) that cooperates with the folding part. The bracket (202) is provided with a first through hole that cooperates with the folding part. The first through hole adopts a cross structure and penetrates all four sides of the bracket (202). The first through hole is set along the height of the bracket (202). The scale rod (3) is slidably connected to the first through hole through a slider (302). The slider (302) also adopts a cross structure. A fixing rod (203) that cooperates with the folding part is also provided in the first through hole.

4. The sliding door measuring device according to claim 3, characterized in that: The folding part includes a first rod (402) disposed away from the display part and a second rod (401) disposed close to the display part. One end of the first rod (402) and one end of the second rod (401) are rotatably connected to the slider (302) and the fixing rod (203), respectively. The second rod (401) is rotatably connected to the first rod (402), and the rotatable connection point between the second rod (401) and the first rod (402) is located between the center and the edge of the first rod (402). The length of the second rod (401) is 1 / 3 to 1 / 2 of the length of the first rod (402).

5. A sliding door measuring device according to claim 4, characterized in that: The measuring device also includes a laser generator (6) disposed on one of the first rods (402) of each set of four hinged rods (4), the laser generator (6) being disposed at the end of the first rod (402) near the display unit, and a laser receiver (7) cooperating with the laser generator (6) being disposed on the other first rod (402), and a number of second through holes (303) cooperating with the laser generator (6) and the laser receiver (7) being disposed on the scale rod (3), the number of second through holes (303) being disposed along the height of the scale rod (3).

6. A sliding door measuring device according to any one of claims 1-5, characterized in that: The display unit includes a scale bar (1) disposed on the main rod (2). The scale bar (1) is disposed on the side of the main rod (2) away from the measuring device. The correspondence between the scale bar (1) and the scale rod (3) and the first rod (402) is set based on the Pythagorean theorem.

7. A sliding door measuring device according to any one of claims 1-5, characterized in that: The display unit includes a display screen mounted on the main rod (2), the display screen being located on the side of the main rod (2) away from the measuring device, and a controller being mounted inside the display screen, the controller being wirelessly connected to the laser receiver (7).

8. A sliding door measuring device according to any one of claims 1-5, characterized in that: The scale rod (3) is provided with a rack (301), the main rod (2) is provided with a gear (204) that cooperates with the rack (301), and the main rod (2) is provided with a locking pin (201) that cooperates with the gear (204).

9. A sliding door measuring device according to any one of claims 1-5, characterized in that: An auxiliary positioning device (8) is provided on the main rod (2). The auxiliary positioning device (8) is located on the side of the main rod (2) away from the display part and is connected to the measuring part. The auxiliary positioning device (8) includes an auxiliary rod (801) that is rotatably connected to the main rod (2). The auxiliary rod (801) adopts a telescopic structure. The auxiliary rod (801) is connected to the folding part through a connecting rod (802). The two ends of the connecting rod (802) are slidably connected to the auxiliary rod (801) through connecting blocks. The connecting rod (802) is rotatably connected to the folding part.

10. A measurement method for a sliding door measuring device, characterized in that: The process, performed using the sliding door measuring device according to any one of claims 1-9, includes the following steps: S1: Inside the carriage, insert the main rod (2) into the gap between the door and the body; S2: The measuring unit is unfolded by the drive unit, and the two ends of the measuring unit contact the door and the vehicle body respectively; S3: Output the measurement results through the display unit.

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